Nest Heat Link Wiring Help UK

[Ashok2429]

Anyone shed any light on how to connect these wires, tried a number of combos and nothing seems to enable Nest to turn on heating. Reinstalled old Honeywell and works no issue. The loop from L to 1 is also confusing me, and then into 4, but this is a combo system, no separate hot water. 

 

[DragosC · Accepted solution]

Hi there @Ashok2429,

Thanks for reaching out. Could you tell us please if you've tried the installation guide from the Nest website? Here's the link for that:  https://bit.ly/3nt2N4t

From what we can see in the picture, it seems you have a combi boiler with hot water on demand. The wiring diagram for that can be found at page 20. The Live wire needs to go into L terminal on the Nest Heat Link and from there, a loop/bridge into terminal 2, and the Switch Live/Normally Open wire needs to go into Nest's terminal number 3. Let me know how it went. 

[Ashok2429]

That worked perfectly thank you so much!

[DragosC]

That's great to hear. Thanks for letting me know. Is there anything else that I can assist you with? 

[AlexD]

Hey there, I haven't heard from you in a while so I'll be locking this thread. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community. Thanks, AlexD.